package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        String md5Pwd = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!md5Pwd.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee =new Employee();
        employee.setName(employeeDTO.getName());
        employee.setUsername(employeeDTO.getUsername());
        employee.setPhone(employeeDTO.getPhone());
        employee.setSex(employeeDTO.getSex());
        employee.setIdNumber(employeeDTO.getIdNumber());

        String password=DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes());
        employee.setPassword(password);

        employee.setStatus(1);
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        employee.setCreateUser(1L);
        employee.setUpdateUser(1L);


        employeeMapper.insert(employee);

    }

    /**
     * 分页条件查询员工
     *
     * @param queryDTO
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO queryDTO) {
        if( queryDTO.getPage() <=0){
            queryDTO.setPage(1);
        }
        if(queryDTO.getPageSize() <=0){
            queryDTO.setPageSize(10);
        }
        //分页的操作
        Page<Employee> page= PageHelper.startPage(queryDTO.getPage(),queryDTO.getPageSize());


       List<Employee> employees=  employeeMapper.page(queryDTO);

        PageResult pageResult = new PageResult(page.getTotal(), page.getResult());


        return pageResult ;
    }

}
